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Platinum-based catalyst containing cesium or cesium compound

A technology of catalysts and compounds, applied in the field of platinum-based catalysts, to achieve good catalytic performance and stability

Inactive Publication Date: 2020-09-15
CHINA INSTITUTE OF ATOMIC ENERGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

And the industrial application of these Pt catalytic materials still faces many challenges, such as large-scale controllable synthesis methods, the stability of catalytic materials, the precise regulation of metal loading, the anti-poisoning ability of catalysts, and how to better integrate advanced metal materials. The preparation method is effectively combined with carbon-supported materials, etc.

Method used

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  • Platinum-based catalyst containing cesium or cesium compound

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Embodiment 1

[0024] Embodiment 1: preparation embodiment

[0025] Based on the principle of isotope separation method, the CsOH with natural isotope abundance is separated through the CAE-1 magnetic separation device of the Institute of Nuclear Technology, China Institute of Atomic Energy. The specific operating conditions are: vaporization temperature 2500 degrees, magnetic field voltage 1000 volts, magnetic separation parameter Cs -134-100. The separated CsOH is collected at the discharge port, detected by ICP-MS, and the abundance of Cs-134 is 100%, thus producing 134 CsOH (the following examples are prepared in the same way 134 CsOH).

[0026] Take 0.6g Vulcan XC-72 toner, 0.1g 134 CsOH powder, 10.25 mL of HO 2 PtCl 6 (0.1mol / L) solution and 17.04mL of NiSO 4 (0.1mol / L) solution was mixed and added to 80mL deionized water, ultrasonicated for 30min to disperse evenly, then under stirring, after adjusting the pH value to 8-9 with 1mol / L NaOH solution, slowly add excess 2.0mg / mL Na...

Embodiment 2

[0027] Embodiment 2: comparison preparation embodiment

[0028] Take 0.6g Vulcan XC-72 carbon powder, 10.25mL of H 2 PtCl 6 (0.1mol / L) solution and 17.04mL of NiSO 4 (0.1mol / L) solution was mixed and added to 80mL deionized water, ultrasonicated for 30min to disperse evenly, then under stirring, after adjusting the pH value to 8-9 with 1mol / L NaOH solution, slowly add excess 2.0mg / mL NaBH 4 Solution, continue to stir for 3h. Wash with ultrapure water until Cl-free - Afterwards, it was vacuum-dried at 60°C for 4 hours to obtain a Pt-Ni / C catalyst.

Embodiment 3

[0029] Embodiment 3: preparation embodiment

[0030] Take 0.6g Vulcan XC-72 toner, 0.1g 134 Add CsOH powder and 80mL ethylene glycol to a 250mL beaker, oscillate ultrasonically for 2h, and add 10.25mL of H 2 PtCl 6 (0.1mol / L) solution and 16.97mL of CoCl 2 (0.1mol / L) solution, then add 21mL formic acid, stir at room temperature for 30min, put it into a microwave oven, heat for 20s and stop for 10s, repeat 5 times, then heat for 10s and stop for 10s, repeat 5 times, cool and suction filter, and vacuum dry to obtain Pt-Co - 134 CsOH / C catalyst.

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Abstract

The invention belongs to the technical field of catalysts, and relates to a platinum-based catalyst containing cesium or a cesium compound. The platinum-based catalyst comprises a catalytic active substance and a catalytic auxiliary substance, the catalytic active substance comprises metal platinum, the catalytic auxiliary substance comprises a cocatalyst, and the cocatalyst comprises one or moreof elementary substances or compounds of a single isotope Cs-134 or Cs-137 of cesium. The platinum-based catalyst containing cesium or the compound thereof has better catalytic performance and stability.

Description

technical field [0001] The invention belongs to the technical field of catalysts and relates to a platinum-based catalyst containing cesium or a compound thereof. Background technique [0002] Catalyst materials and catalytic technology are one of the basic and key materials and technologies for the development of today's chemical industry. In modern industry, the output value generated by the use of catalytic technology has accounted for about 30% of the total output value of the national economy. [0003] The outer electron configuration of noble metal Pt is 5d 8 6s 2 , followed by a total of 8 d electrons in the outer layer, and the orbitals are not filled. And because the energy level contains unpaired electrons, Pt can exhibit strong ferromagnetism or paramagnetism in physical properties; and in the process of chemical adsorption, these d electrons of Pt can interact with the p electrons in the adsorbate. Or s-electron pairing, chemical adsorption occurs, and interm...

Claims

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Application Information

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IPC IPC(8): B01J23/58B01J23/89H01M4/90H01M4/92
CPCB01J23/8946B01J23/58H01M4/921H01M4/923H01M4/926H01M4/9041B01J35/33Y02E60/50
Inventor 王玲钰欧阳应根肖松涛
Owner CHINA INSTITUTE OF ATOMIC ENERGY
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